Means por supporting baffles in oil-filled bushings



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MEANS FOR SUPPORTING BAFFLES IN OIL FILLED BUSHINGS sept. 15, 1,931.

Inga' INVNT ,4r/[zur 0.4051727.

Reiund se. 15,1931

UNITED STATI-:s

ARTHUR, O. AUSTIN, F NEAH BARBEBTON, OHIO, ASSIGNOR, BY HESNE ASSIGNMENTS, TO THE OHIO BRASS COMPANY, OF MANSFIELDQOHIO, A CORPORATION 0l' NEW JERSEY origini no. 1,726,096, dated This invention relates to insulator bushings for high potential conductors and has for its object the provision of insulators of the class named whlch shall be of improved construction and operation and which shall have im-` proved means for supporting parts within the ushing, and maintaining a tight joint between the parts.v

The inventlon 1s exemplified in the combi- 10 nationand arrangement ofparts shown in the accompanying drawings, and described in the following specification, and it is more particularly pointed out in the appending 20 ing a somewhat modified form of the invention. Fig. 3 is a view similar to Fig. 2 showing another modification.

Fig.v 4 is a view similar to Fig. 1 showing 2l ystill another form of the invention;

Figs. 5 and 6 are views similar to 2 and 3 showing other modifications.

Fig. 7 is a view similar to Fig. 2 but showing a connection by which the invent-ion may 3l be used for providing an electrostatic coupling for synchronizing signal circuit or communication work.

In one method of making high voltage bushings, the bushing consists-.essentially o f 3l two hollow members which are clamped together to form one outer shell. Inside of this shell are placed insulating bales to prevent dielectrlc breakdown between the Jcenter conductor and the flange of the bushf ing. Bushings of this type are made for various purposes, such as transformers, oil circuit breakers and entrance bushings.

In order to provide the necessary`electrical characteristics, it isl necessary'to provide .4i a suicient diameter so that the dielectric material will not be overworked. This necessitateslarge and diicult dielectric members unless the bushing is made in smaller ieces.

l' In the construction shown in Fig. 1, all of xmms Fon. surronrmc nArrL'Es 1N oIL-FIILED :ausHINos August 27, 19.29, Seria-l lo. 731,503, led August 11, 1924. Application for reissue illed J'une 13, 1931. Serial 116.544,248.

the dielectric members are -readilymade and have the same ei'ect as though the bushings were made up in a solid piece. In Fi 1, the bushing consists essentially of a dielectric member 10 with water sheds or ianges 11 and a dielectric member 12, which are held together by a conductor rod 13 having clampingV nuts 14 and 15, thegsket 16 formlng a tight mint. Owin to t e space 17 around the illes being ed with o1l or insulating compound, itis necessary to prevent this leaking out at the center. Thel gasket 16, which may be ofcork or other suitable material, forms a tight joint bwhen nut is tightened up.

As the dielectricmembers 10 and 12 are adjacent to leach other with only a gasket between, it is a comprativel easymatter to forma tight joint, even t ough the range of temperature may be considerable. This is 'due to the fact that both dielectric members will be at practically the same tempera-v ture and have the same linear coeiicient and -vwill expand and contract radially at the same `rate.

This avoids any tendency to set yup stress or destroy the gasket by slipping as is likel to be the case where the dielectric mem r is clamped against a metal flange or sleeve having a different rate of expansion than the dielectric member.

\ This invention has to do with the means of supporting the cone or internal screen 18. The electrostatic shield orvscreen 18 is provided with a radial ilange or projections 19, being preferably tapered at the outer edge. This wedge shaped Hange or projections is inserted in or placed between the layers of the gasket 16 so that when the two dielectric members are clamped into position, the gas-` ket will hold lthe projecting flange 19 firmly in position so as to supportL the static shield 18 and the dielectric baiiles 20l and 21 if they are attached to Athe shield. As the wedge shaped sup orting section 19 is held in the gasket 16, t erewill be no. electrical contact if the gasket is of an insulating material. In, this case the charging current between the projecting iiange 19 and the flange 22 or the ange 23 would cause destruction of the gasket and permit the bushing t'o leak unless prvision is made to prevent this eiect.

Electrical contactis toobviate this dilliciilty.A ferential expansion7 dr contraction will not Electrical contact is providedthrough the set up a high stress. f tubular member 24 which makes contact with In Fig. 43, a, similar 'arrangement to that a ring member 25' attached to the static described in connection withV Fig. 2 is shown 7 5 Shield 18. .This tubular member 24 can also .with the exception that the dielectric mem- 70 bensed for 'egulialtiilig height of the oilv bers lhave 7square ends adjacent the 4lilolding orcom oun int e us 'n meii er 3 rather than ta ered. 'T e ro- Electlziical' contact may ge made directly jectinglange or member 3llmay be split) up f lo between the ilneiiliber 231andtlheanlg22 byf iitohsections, and, -when attached to a ortion ajumper or ea o r, w ere e insu a ingo o t eelectrostatic-shield,which is bac edu 75 thev gasket'is suicient, electrostatlc capaclty `there will be sulicient resiliency so 'that these Y between the Sln 18 {llld' the lead 1311135' will be no tendency for the projecting -mem-f be Used fof .electl'tlc ClPllllg f0 l Slldl ber 37 to work in the joint-and destroy7 the l5 as synchromzing or. signal circuit or comgasket, A

Illllmclltln W0l'k 'Connection t0 the Screen( It 1s evident that the desired results m'ayJBO .18 fOr thi:s llfly lbmdl :2y COlllet be obtained by changing the relative propor- 111 a S111 a 60C P108 lIlS a 1D eYl tions or the minor details, some-of lies y 57gin the circuit between the screeng 18 andl ing shownV in Figs 4, 5 and 6 t e be ,the flange 22, 3S Shown in' Fig- 7 Where it -In Fig. 4, the lower dielectric member 40 o S not desfeiifuse f he eltloSt-atic Capacity, has a4 fiat bearingV surface which is easily V35 Smlmnpel Sglpf 26 1S Place lvthe grlpund on a surface table or byv other means. Vgaske as as orm con ac een e u r i i the upper and lowqr metallic Hinges Whew sa berngdriitl iilefn; sorelisii; u' the Contact 1S mamtamed emilrely bellween surfaced.- The projecting ring 43 neednot the center Todi the lang may be'omltedbe turned up as a gasket o'r'other cushioning 9 If. the gasket' 1.8 oonduihng .01" 1s Provldedmaterial may be usedlto hold the projection Wlth a Conduct@ -layer or mserti th? elec"- 44 which is secured't'o the electrostatic screen 111171091 COlltflt 'W11 so be Provlded, mth, the 45 and holds the screen and the ballles 46 and i. essere A '48 be tween the sleeves or bellies 47 and the coii-l lhugh the emd' t ductor 49 so that there will be no danger-of .Sllle at We!! lmngement s the baille strikin 'the'oi'iter dielectric shells shown in Fi 2 In this case-the ilan 30 gis attached tile dielectric member 1% by due to excessive vibra-tion or in clamping the l 35 Bement or suitable material 31 and the flange two p-art's of-'the Shell toget-hel" 'Il-lus con' 100 Y structionhas the advantage in that all parts 32 isattached to its corresponding dielectric may be turned up easily and baflles and elecmember 33 by cement or holding material -trostatbe l d. be 34.` A gasket-35 is placed between the two f hic screen ma'yEl p a-ce m posmon dielectric members and a tight joint made by om c mpmg up ectncal Contact may oA clamping up with the bolts 36. The wedge made by the conducting dam or strip 50 as in sha projections or flange A3'? is inserted, tlrlous i pre eably in the center of the gasket. The o er met o adjacent edges of the dielectric members 10 of'beal'mg forthe gasket 1S Shown 1n F 1g' 5' v and 23 are preferably tapered so as to con. fllfhe dglecticn'lle's hav) thileed sec' v 45 form to the holdin `member 37. .109s an W c may e a e ait-her 11n metallic member 39g'is placed in electrical mslde 91' outslde the 0m31.wlu.

contact with the member l37 and extended i In.F.1g 6 th? oonstmd'fmn 1s Slmllar. t? that out through the gasketV or betweeiithe layers P1. 'E13'. 4- elcePt; that a reessed p0rno 5.3 of the C et and turned over the edge. of -ls provided in each dielectric memb'ei I t 1s o the l I et sothlt they will be. i'n .metallic evidenthat this thinner section maybeeither n@ cont with 32 and 30 inside or outside the normal wall. In case This arrangement will .su Ply the neces; the projection is on the outside it may be usedA any charging current to' e electrostatic 'as ashoulder for thefmetallic flanges to rest screlilinfl, '121e oontaclllznep'ilbar 39 mabe Pnluf clamplng uP- inteormoa' w'c actasa am Cflm: s

to prevent leakage t ugh the gasket. This 1 All insulator comprising a pair of comis particularly advisable where-the joint be- -plqmentry dielectric libells hilvmg registween the metallic flanges and the dielectric is tlmg Parts, means for clmpmg Sa-ld Shell@ of an openstructure to provide resiliency and together to form a closed casingz a gasket 0 the bushings are used under pressure, which interposed between said registering parts 126 is likely to force leak Vthrough the joint. Y and a supporting device clamped-by said reg- The construction has t e advantage in that stering parts in contact with said gasket,

the bushing may be readily bled or Said dvlce .having it-S outermost POIiOll d taken down, and, as there is no large mass of within the outer'periphery of said registerf 5 metal between the dielectric members, difingparts.` f 13 n f providing a good width I 2. An insulator comprising a pair of complementary dielectric shells avln registering parts, means for clamping sai shells toether to form a closed casing, a pair of gasets interposed between said registering part-s and a. supporting device 11a-ving a portion disposed ybetween said gaskets and held ange having its outer edge disposed within' the outer periphery of the adjacent portions of saidshells.

4. An insulator bushing comprising a pair of complementary shells, means fory clamping said shells together to form a closedv casin and a circular support arranged withinV said casing and having a relatively thin flange extending between said shells, and clamped thereby, the outer`dia1ne'ter of said flange being less than the outer diameter of said shells adjacent said flange.

of complementary dielectric shells arranged to register with one another, `means for clamping said shells together` to, form a closed casing, a baffle disposed within said casing, a. supporting ring for said baffle having a relatively thin flange extending between said shells and clamped thereby, the outer'diameter of said flange being less than .the outer diameter of said shells adjacent said flange.

6. An insulator comprising a pair of complementary members, means for clamping said members together and a support having a tapered flange with-its thin edge extending between said members and clamped thereby and its thicker edge projecting from between said'members. A 7. n 'insulator comprising a pair of complementary dielectric shells, means for clamping said shells together to form a closed casing and a support having a tapered flange having its thinner edge extending between said shells and clamped thereby 8. An insulator com rising a pair of complementary shells o dielectric material, means for clamping said shells togetherto form a closed casing, a gasket'interposed -between the registering portions of said shells and a supporting member having a tapered flange engaging said gasket and clamped agamst said4 sket between the registering portions of said shells.

9. An insulator bushing comprising a pair of shells havin the edgesthereof arranged to register wit each other, a gasket interposed between said edges, lmeans lfor clamp- 5. An insulator bushing comprising a pair.

ing said edges against said gasket to form` j a tightjoint between said shells and a supporting flange extending into the joint bestween the said edges for a portion only of the thickness -of said yshells where they register with one another.

10. An insulator bushing comprising a pairof shells having the .edges thereof arrangedto register with one another, means for clamping said edges together t-o form a tight joint, the inner portions of saidedges being offset to provide clearance therebetween and a 'supporting flange disposed in said offset portion.

11. An insulator. bushing comprising a pair of dielectric shells having the edges thereof arranged in registration with each other,a gasket interposed between said registering edges, 'means for clamping said shells t0 each other to form a closed casing and-a supporting ring disposed within said casing, saidy ring having the outer circumference thereof extending into the joint lbetween said registering edges for a portion only of the width of said joint. X

12. An insulator bushing comprising a pair of dielectric shells having registering'edges, means for clamping 'said shells to each other to form a tight joint between said edges, a gasket disposed betweerr said edges, a baille, within said bushing and a supporting flange secured to said baffle, the registering edges of A'said shells having the inner portions thereof recessed to provide^elearance into which the outer portion of said supporting flangeprojects.

13. An insulator comprising a pair of complementary dielectric shells having registering edges. a pair of gaskets interposed between said edges, a baffle arranged withinsaid bushing and a supporting flange for said baffle extending betwen said gaskets for a por. '.tion only of the width of said registering edges. g/f

14. .An insulator bushing comprising a pair of complementary dielectric shells, forming a closed casing, a flux screen arranged within said casing and having a supporting flange extending radially therefrom between adja- .cent portions of said shells and` means for l clamping said shells together to form a tight vjoint and to secure said supporting flange in position, the outer diameter of said flange being less than the outer diameter of the registering parts of said casing.- 4

' I5. An insulator bushing comprising a pairy of complementary dielectric shells hav- 1 ing registering edges, a cylindrical flux screen disposed within said bushing and having a flange thereon extending outwardly between the shells, a dielectric-baille secured to the inner portion of said flux screen, a gasket interposed between said shells and extending `therebetween beyond the outer edge of said flange 'and means for clamping said shells together to form a tight jolnt and to support said Hange. l n

16. 'An insulator bushing comprising a lpair of 4colnplementary dielectric shells havin g registering edges, metallic flanges` secured to the outer surfaces'of said shells adjacentv tov said registering edges, a baille within said bushing. a flux reen .within said bushing, said baiile and scr e'n beingsecured to one another, Va flange for supporting. said baille and screen extending between said registering'edges for a portion of the thickness only thereof, means for'clamping lsaid shells together to form a closed casing and an electrica-l connection between said iiux screen and said outer ianges.

17. An insulator bushing comprising a pair of `complementa-ry dielectric shells having opposed edges, `metallic anges secured to the 'outer surfaces of said shells adjacent said edges, a flux screen within said bushing, an el lical conngction between said ux screen L. and/said flanges, and means for connecting an 25 electrical translating device in said electrical connection.- Y f 18.` The combination-withja bushing insulator of a conductor extending through said insulator, a capacitance member disposed 39 within said insulator and insulated from said `for connecting an electrical translatingl dei vice with, said capacitance member for energizing said translating device, said capacie tance member and conductor forming a condenser and roviding capacitance coupling between said conductor and translating device. 1 v

22. Means for `formin electrostatic coupling with a high potentlal valternating cur,- rent circuit comprising a high potential conductor adapted for connection Awith saidv circuit, a bushing Vinsulator v'through which said conductorfextendsa a capacitance membenof conducting material disposedwithin sald 1nsulator and insulated from said conductor by said insulator, and means for connecting an electrical translating device with said capaci- Y Y conductor .and providing electrostatic coul pling 1with said conductor and means for conv nectmg -said capacitance member with synchronizing apparatus to energizev said appa- 5 ratus from said conductor.

19. The combination with a bushin insulator of a conductor extending throng said insulator, 'a support .of conducting material for saidbushing insulator, a ca acital'ice` member disposed within said insu ator .and insulated from said conductor and from said support. and an electrical translating device disposed outside of' said insulator and electrically connected between said capacitance member and said sup rt.-

20. Means for sync ronizi high` potential alternating current elecg circuits comprising an insulator, a con u by said insulator and adapted t'o form connection with `onel of said'high potential circuits 7and a low potential member of conducting material insulated from said conductor by ctor insulated i said insulator and adapted for connection f with synchronizing apparatus, said conductor and low potential member constituting a condenser forming an electrostatic coupling with l said high potential circuit. 21.7Means "for `formin electrostatic coupling with a high potentlal alternating cur- 0o rent circuit comprising a high potential conductor adapted for connection with said cir-l cuit, a bushing insulator through which said conductor extends, a capacitance member of y conducting material insulated from said con- 05 ductor by said bushing insulator, and means 

